If all the SCR's of 3 phase PAC is replaced by diodes, they would be triggered_____________?
Correct answer: B. 60 degree after the zero crossing of the corresponding line voltages
- A. 120 degree after the zero crossing of the corresponding line voltages
- B. 60 degree after the zero crossing of the corresponding line voltages
- C. 120 degree before the zero crossing of the corresponding line voltages
- D. 60 degree before the zero crossing of the corresponding line voltages
Explanation
With diodes replacing the SCRs, conduction begins automatically when the corresponding line-voltage conditions forward-bias them, equivalent to the natural triggering position 60 degrees after the stated line-voltage zero crossing in this PAC convention.
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